Leases - Additional Lease Information (Details)	12 Months Ended
	Sep. 26, 2020 USD ($)
Leases [Abstract]
Operating lease cost	$ 27,500
Finance lease cost - amortization of right-of-use assets	300
Finance lease cost - interest cost	1,000.0
Operating cash flows from finance leases	1,000.0
Operating cash flows from operating leases	23,900
Financing cash flows from finance leases	1,700
Total cash paid for amounts included in the measurement of lease liabilities	26,600
ROU assets arising from entering into new operating lease obligations	$ 13,300